cover 1918 (2 Nov.) XU5 from Beirut to Cairo, marked "1PT" and showing "FIELD POST OFFICE/SZ 8" c.d.s. partly obscured by Palestine 1pi. (applied at Cairo) which is tied by "BASE POST OFFICE" c.d.s. (13.11), the XU5 also showing, on reverse, Censor label with Port Said (20.10) and Cairo (22.10) c.d.s. Rare, the earliest date of a prepaid cover. Photo